石家庄市冬季大气颗粒物中元素组分的特征分析

为研究石家庄市大气颗粒物的污染特征及其来源,于2013年2月选取石家庄市6个点位,分别采集大气中TSP,PM10和PM2.5的样品,采用ICP-MS法测定颗粒物中20种元素的浓度,并采用相关性分析、t检验法和富集因子法分析探讨石家庄市冬季大气颗粒物中元素污染特征。结果表明,石家庄市城区Al,Ca,Si,S元素在不同粒径颗粒物中含量都较高。根据标识元素分析,颗粒物中无机元素主要来源于燃煤尘、建筑尘和土壤尘,TSP,PM10和PM2.5中无机元素具有较好地统计相关性和同源性。通过富集因子分析,石家庄市大气颗粒物中的元素受人为因素影响的主要污染来源为燃煤、交通排放和冶金化工尘。

Feature analysis on elemental composition of atmospheric particulate matter in winter in Shijiazhuang City

To investigate the pollution characteristics of atmospheric particulate matter and its sources in Shijiazhuang City, TSP, PM10 and PM2.5 were collected in February 2013 at six sampling sites in the urban area, and 20 elements in the samples were determined by ICP-MS. The inorganic elements pollution characteristics in Shijiazhuang winter atmosphere were analyzed by using correlation analysis, t test and enrichment factor analysis. The results show that the elements of Al, Ca, Si, S have high content in particles with different size. According to identifying elements analysis, inorganic elements in particles mainly comes from coal dust, construction dust and soil dust. TSP, PM10 and PM2.5 have strong statistical correlation and same sources. By enrichment factor analysis, the main sources of elements polluted by human in Shijiazhuang atmospheric particulate matter are coal dust, traffic emissions and metallurgical chemical dust.